Explosive-engine.



H. G. HOLMES. EXPLOSIVE ENGINE. APPLICATION mum JUNE 1;, 1am.

948,925. Patented Feb. 8, 1910.

UNITED sra gns ra'rnnr orrron.

HERBERT GLENN HOLMES, 0F LANSING, MICHIGAN, ASSIGNOR T0 IDEAL MOTOR COMPANY, OF LANSING, MICHIGAN, A CORPORATION.

EXPLOSIVE-ENGIN E.

Specification of Letters Patent.

Patented Feb. 8, 1910.

Application filed June 15, 1907. Serial No. 379,192.

My invention relates to gasolene engines and its object is to produce an engine in which not only the cylinder, but the valve chambers shall be-effectually cooled and at the same time the difficulty of cleaning the 3 water jacket shall be avoided, the danger of injury by freezing reduced to a minimum, the quantity of water necessary for effective cooling largely decreased, the necessity of a separate water tank avoided, and

- the engine itself be cheap in construction and effective in operation. I attain these purposes by the mechanism set forth in the accompanying drawings in whic Figure l is a vertical section. of my engine cylinder and water tank along the line waz of Fig. 2. Fig. 2 is a horizontal section along the line y3 of Fig. 1 and Fig. 3 a horizontal section along the line zz of Fig. 1.

In the'drawings, 1 is the engine cylinder .which is of the usual construction. A Water jacket surrounds the upper end of the cylinder extending downwardly to substantially the lowest point reached by the' piston in its travel and has an enlarged tank extending upwardly therefrom and connecting directly therewith to constitute a combined condensing and cooling chamber 2. The

water jacket and'cooling tank are integral one with the other and with the engine cylinder. An inlet and exhaust passage 3 opens from the upper part of the engine cylinder as shown in Fi 2. In this passage are mounted the in ct port 4 and the exhaust port 5 which are of the usual construction. These ports are separated from one another by a vertical partition and closed by valves 6 of the usual construction as shown in Fig. 1. The ports 4 and 5 open respectively into chambers 7 and 8 as shown in Fig. 3. The valve stems 9 pass down through guides in these chambers and the valvesare operated in any preferred'manner. It is evident that by this construction the entire upper part of the cylinder and the valve chambers 7 and 8' are continually kept certain ignition.

cool by contact with the water in the tank. It is also evident that the large size of the chamber surrounding the upper end of the cylinder makes cleaning very easy and avoids all difliculties arising from deposits of lime and other material from the evaporation of the water in the tank.

The curved form of the base of the tank makes injury from freezing extremely unlikely to occuras the 'water is thus free to expand in an upward direction and the cylinder, tank and valve chambers can all be cast integrally as one piece and require only a minimum of machine work and labor thus making the device very cheap in construction. t the same time, the closely fitting cover of the tank and the highly eflicient radiating qualities of the material of which it is composed, combined with the closeness of contact ofthe water with the cylinder and the perfection of circulation make the cooling extremely eflicient and at the same time employ only a very small quantity of water which is easily and conveniently replaced. The tank itself being formed of cast iron instead of the usual thin metal and integral with the engine cylinder, is absolutely free,from any liability of derangement or injury and is as durable as the engine itself. The spark plug 10, as shown in Fig. 2, opens into the chamber 3 between the ports't and 5 and is thus in the freshest of the admitted charge and in the most favorable position for prompt and A lid 11' is provided to close the tank. It also operates in connection with the main covering of the tank to condense a large part? of the steam formed by the evaporation of the water.

I claim as my invention,

1. In an explosive engine, the combination of a cylinder and a transversely extending -inlet and exhaust passage adjacent ohe en thereof, oppositely disposed inlet and exhaust ports connecting with said passage and extending longitudinally of the cylinder, valves for the ports, a spark plug ari ranged at a point between said ports, and a cooling ,tank having a portion embracing the cylinder and arranged to extend over the cylinder end and ports, whereby the upper surface of the same are subjected to the direct contacting action of the cooling medium inthe tank, and means for affording access to said ports through said tank whereby the valves may beremovedwithout disturbing any other part of the engine.

' 2. In an explosion engine, combination of a' cylinder, a cooling tankeast integral therewith and embracin the-upper portion thereof and extending a ovethe to thereof thereby formin a space between t e cylinder and the sai tank and above the cylinder adapted to be filled with cooling fluid, inlet and exhaust valve chambers, a vertical partition separating the same, said Valve chambers (communicating at their upper part -tankcasing and cylinder and located within 15 with a port leading to the cylinder, said valve chambers being cast integral with the the tank in va manner such [that the coolin fluid contacts with the top and sides thereo In testimony whereof I have signed my name to this specification in the presence oftwo subscribin witnesses. t

" HERB ERT GLENN HOLMES.

Witnesses: MAR): S UIRE COBB, C. P. W001). 

